Brake-shoe.



y Thisintentionrelatesftofbralielshoesi fm. I .brake-shoe' adapted foruse cn Wheelsoffmja.-f

p L .fteri'ally"differentfdiaineters-fsay,I foreXam-f 1e,`driverwheelsranging iny diameter 'from'.

' The jobe t? f the invention is toprovidea' orY-f'eight inchiestes'eventy-'iwoinchesf thereby providing for using'alsing'lepatt'ernof'fshoe onthe different'diameters Aof wheels insteadol' ajdifferentpattern 0n eachfdifle.-

'i e yent diamet'er'of Wheel; Thepractical'advanftage's of this featureare, first, thatit Will ne' zo cessitate carrying v a very srnall stockof brakeshoes comparativel and, second, yconvenlence in selectlng as oeforfuse on'anypartic-' ular Wheelv and velimination of all possibility11n vif is alplan view of theface or'frictionesurface of a shoe of'myinvention', and Fig. `3 is ka sec# i, tionalriewthe'reofon theline SQfFig.v 2.1 f" i I. l n. ofrn inventionwillbeto drive'rlbra e shoes fort e`reason' thatd'river-Wheels are rnade ,of f i Widelyrvaryingdiarne't'er's, i whereas ordinary car-Wheels are;y commonly madezfofsubstarr-l --jf tially` the saine diaineter-. gf For v'}; u1 p'oses lof"illustration, therefore, I have'shown my 1in-Q `Q45kr ventionasvernbodi'ed'in adriverbrakeshoef All of-theforegoingiparts maybe ofanydef, s'ired j or approved-g1.construction VVVas re'gards ytheiriusual features and'will b ereadily'undcr-j ""stoodfhywpersons`familiar' withfthe-art from.-`

' kof mistakes through the selection yof 'a shoe 0fthewrongpattern. Yl'To' this end a brake-'shoe of my invention consists vof the -variousvfeatures', combinations 1 of features and details of construction'here-y Sinafter described andclaimed.l Y l 'f In the accompanyingdravsfings', `in 'Which a *brakeshoe lof iny'y inventiony is" full`killusvvtrated Figure 1 is a sideviewzof a bra e-shoe Vof m'in'vention,together With'a brakehead ch saidbrake-shoe is secured.y f Fig'. 2

practice-f` thel most common ap lication 'BOOTH;en-.MILWAUKEE;'Wisconsin l 'anfinspectioriiof vthe drawingswithout' afdetailed'descriptionvthereof. i f p f-The'curve V.of the face or4fricti'omsurface of y f fthe'brakefshoe isfap roxilna'telyhalivsfaybei-` tweentheycurvesp ftheztreadsefthe -largestyaandfsinalle'stavheels on which?=- the shoe' is de-v z'signedoruse,andformed en the face `vor fric-Y tion-surface of thevbrake-shoearetra'nsvers'e 1 ribs or-projections The height of said pro.- jections1 is such-that when the-shoes are rst *f i appliedthey Willwithinf thedesigned limits A o kuse vhold, thef-aceoitheshoeout 'of Contact"Petiiiied'eresia-iet);isos; i

withthetreadfofthe-Wheel, and theyare so vpositev toaithe` brake-headbearings 2 on t e theshoe `is designed for use `will just Contact withthefac'e or 'friction-'surface ofthe "shoe,` the smallest wheellati thecentereofgthe shoe i .andthe'lar'gestatthe endsof said shoe. As i saidribs or projections Wear,v therefore, the f i `facev or friction-surfaceof the shoe v'villgradu-v Aally comeintolfull bearingwith` the treads of4located thatthepowergexerted in appl ing 'y l `thelhrakes will-betransmitted in direct inesy i through them, beingpreferably directly()-A7 o ack .of theishoe.v v"Preierfaibly alsoA the' height ofsaid ribsroriprojections is such that treads 1 .of the largest and*y smallestWheels on ywhich the wheel, except, in the case ofwheels the -eurveofthetreads of which is thesa'meas'that of theface"orfriction-surfaceof'the brake- 5 f shoe, "in Which'case the face.orrictionlsur' face of the brakeshoe willfnotcome into contact vWiththe f tread :of the yWheel *untill lsaid ribS 01" r projectionsareentirel Worn o'fffand will 'then come atonce into ful bearingthere- 1. with: For the purposefof illustrating'the de-;scribedirelation Ihavevin Fig. 1 ofthe draw- 1.

`ingsindicatedf'bjthe dotted lines :1.2,vy, `and ziithe'jcur'vesiof thetreadsfof Wheels ofl the largest; l'nean', andsrnalles'tdiameters,frespecj v jtiily,y onfwhiohithe vbrake-'shoe is designedy'ITheribszor projectim's.y 1 .are 'preferably j rnade-ofsoftycastironandare narrow, sayfrom'one to tWo inches'wide.1` They Will thusf "j i'we ardown` uickl vs'c, a'st 0' bring thehrake#r "shoeinto fulhearing'with'thewheel at points inline with thebearings'of thebrakeshoefon the'brake4head, wl1ile atthe vsamedtinie :affording 4s uilic'ie'nt.support' to said shoe vvat 'pointsfremo'tefjrom its o-int or points of.Linitial Contact With the 1w leel to practicallyv elirninate allshearing stresses in sai'dshoesin operation.- i jj 1 In brakeshoesembodying m invention the body ortion A is preferab y made of standard t'okness throughout, the ribsor Frojections 1 forming extensions abovethe ace or friction -surfaoes thereof. In this manner-.the full life ofthe shoe is secured.

I claim as my invention- 1. A brake-shoe having two ribs or projectionson its face or-friotion-surfaoe one be" ro tween the center and each endthereof. l

2. A brake-shoe having two-'ribs or rojeci tions on itsv face orfriction-surface so ooated that the power exerted in applying the brakeswill be exerted directly through them.

i 5 3. A brake-shoe having tWo ribs or projections on its face orfriction-surface one loeinem cated substantially in line with eachbrakeheadbearing on the' back ofrthe shoe.

4. A brake-shoe the face or friction-surface of which'isa curve of meanradius, said shoe having two ibs orprojeotions on its face orfriction-surface one lo line with eachbrake-head bearing on the back ofthe shoe. 4

In testimony that I claim the foregoing as my invention affix mysignature, in resence of two subscribing witnesses, this 24t day ofJune, A. D. 1905.

WILLIAM G. MENZEL.

Witnesses:

I. W. MoPHERsoN, C. W. ANDERSON.

cated substantially in

